1422220 has 48 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 518144.

The previous prime is 1422199. The next prime is 1422221. The reversal of 1422220 is 222241.

It is a self number, because there is not a number n which added to its sum of digits gives 1422220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15936 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2^1422220 is an apocalyptic number.

1422220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632960).

1422220 is an abundant number, since it is smaller than the sum of its proper divisors (1843700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1422220 is a wasteful number, since it uses less digits than its factorization.

1422220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1422220 is about 1192.5686563045. The cubic root of 1422220 is about 112.4576301352.

Adding to 1422220 its reverse (222241), we get a palindrome (1644461).

The spelling of 1422220 in words is "one million, four hundred twenty-two thousand, two hundred twenty".